说开

1. explain clearly

♦ 你还是把事情的原委跟他~了, 免得他猜疑。 You'd better explain clearly to him how all this came about, so as not to leave him in doubt.

2. (of words or expressions) be in current use

♦ 这个词儿已经~了, 大家都懂得。 This word is in current use, and everybody understands it.